/*
 * chombo: Hadoop Map Reduce utility
 * Author: Pranab Ghosh
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You may
 * obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0 
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
package org.chombo.types;

import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author pranab
 *
 */
public class StringDataType extends DataType{
	protected String patternStr;
	protected Pattern pattern;
	protected Set<String> categories;

	/**
	 * @param name
	 * @param patternStr
	 * @param strength
	 */
	public StringDataType(String name, String patternStr, int strength) {
		super(name, strength);
		this.patternStr = patternStr;
		pattern = Pattern.compile(patternStr);
	}
	
	/**
	 * @param name
	 * @param categories
	 * @param strength
	 */
	public StringDataType(String name, Set<String> categories, int strength) {
		super(name, strength);
		this.categories = categories;
	}

	/**
	 * @return
	 */
	public String getPatternStr() {
		return patternStr;
	}

	/**
	 * @param patternStr
	 */
	public void setPatternStr(String patternStr) {
		this.patternStr = patternStr;
		pattern = Pattern.compile(patternStr);
	}
	
	@Override
	public boolean isMatched(String value) {
		boolean matched = false;
		if (null != pattern) {
			Matcher matcher = pattern.matcher(value.trim());
			matched =  matcher.matches();
		} else if (null != categories) {
			matched = categories.contains(value);
		}
		return matched;
	}

}
